How may I add support to avoid this artifact?
I have tried several approaches to removing a flaw in a print and I have failed. I ask for your assistance in allowing me to fix this flaw.
I have attached STL, 3MF, and G-code files (ZIP’d) so that you can see what I did. These files represent, just a portiont of a larger part from which the example files were removed for this print. I printed this part, and it does exhibit the flaw.
I printed this on a factory-assembled CORE One with current firmware and with the current Prusa Slicer in Overture PETG. While printing, I can see that the problem is Y-axis vibration as the print head gets further from the base. The problem stops when printing bridges the top of the “window” thereby connecting and stabilizing the panel.
I believe that what I need to do is to provide a support resisting Y-axis motion on the unsupported panel in the problem area. It seems like that type of support is not available in the slicer. Additionally, this part, in production will have a fuzzy skin, and it seems that the current slicer does not allow for both supports and fuzzy skin.
To work around my lack of knowledge regarding support options, I jury-rigged a “plug” in the “window” with spaced projection-points on sides, top, and bottom of the “window” to stabilize the otherwise unsupported panel. With trial and error, I found that a 0.003-inch clearance provided a plug that did stabilize and was removable, yet it left unacceptable residuals on the window edges.
I have likely overlooked some built-in solution or easy workaround. Will you please help me out and educate me?
Best Answer by JoanTabb:
Yes, I believe that was the Zip file,
It looks like you saved the zip file to the forum database, then had a problem...
there seem to be two copies of the zipfile in the database
Problem example files 
the image above is a prime example of the porthole effect,
please click on the image
and an 'Insert into post' box, should appear... this may be what you missed when trying to add the zip file.
what I was trying to suggest, was adding a disposable support like this
again, click on image to see full image please
you seem to have designed in inches. so the part initially opened really small...
Revised part
the additional brace, should print without supports, and should be easy to remove with a knife
hopefully this file, helps
regards Joan
RE: How may I add support to avoid this artifact?
have you tried turning the part 90 degrees?
another option is to add a diagonal brace at 45 degrees to the long gap, ending just below where the unsupported wall starts thinning, to stiffen it up a little the 45 degree angle should negate the need for full height support.
regards Joan
I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility.Location Halifax UK
RE: How may I add support to avoid this artifact?
Thanks for the ideas.
I cannot rotate the part 90 degrees for printing because of the remainder which was removed from this test example.
Regarding a diagonal brace at 45 degrees, since the motion causing the problem is in the Y direction, that brace would have to go to the wall behind the floppy part. Because the suggestion is for 45 degrees, I think it intends that the brace be within the "Window." That would both not restrain Y-axis movement and would have the same residual problem as the plug with projections that did stop vibration.
Do you know why the graphic (.png) that I sent is truncated at the top and bottom. I checked it after I saw what would have been posted and believed that it would be withheld until I learn how to send what will fully describe the problem better.
Did the set of STL, 3MF, and G-code files, (ZIP'd) come through OK?
I am new at this and want to send valid and complete information.
Should I, and can I, remove this post until I learn how to post correctly?
RE:
Good morning,,
the Forum has some peculiarities
your image above appears in a sort of 'porthole' on the forum post page. If the viewer clicks on the image, it opens up to show the top and bottom.
The Zipped files did not come through unfortunately.
They may well have helped
was this the Zip file?
Problem example files
I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility.Location Halifax UK
RE:
Yes, I believe that was the Zip file,
It looks like you saved the zip file to the forum database, then had a problem...
there seem to be two copies of the zipfile in the database
Problem example files
the image above is a prime example of the porthole effect,
please click on the image
and an 'Insert into post' box, should appear... this may be what you missed when trying to add the zip file.
what I was trying to suggest, was adding a disposable support like this
again, click on image to see full image please
you seem to have designed in inches. so the part initially opened really small...
Revised part
the additional brace, should print without supports, and should be easy to remove with a knife
hopefully this file, helps
regards Joan
I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility.Location Halifax UK